superior flow measurement accuracy - … accelabar®...a new idea in flow measurement the unique...

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Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com/veris for up-to-date information.

VERIS ACCELABAR® SUPERIOR FLOW MEASUREMENT ACCURACY

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Accelabar® nozzle

Verabar®

Diffuser cone

Toroidal inlet

Stabilizing & linearization section

RTD (optional)

VERIS Accelabar® ...A New Idea in Flow Measurement

The Unique Accelabar® Flow MeterThe Accelabar® is a new and unique flow meter that combines two differential pressure technologies to produce operating ranges never before attainable in a single flow meter. It is capable of generating high differential pressures for measuring gas, liquids and steam at turndowns previously unattainable—with no straight run requirements.

How the Accelabar® WorksThe Accelabar® consists of a unique toroidal nozzle design and a Verabar® averaging pitot. The nozzle has a patented straight run “settling distance” that accelerates, linearizes and stabilizes the velocity profile sensed by the Verabar®. The Verabar® located within the nozzle accurately measures and significantly increases the differential pressure output to increase the operating range (turndown). The Accelabar® has a constant flow coefficient and produces an accuracy of up to ±0.50%.

Other manufacturers claim high accuracy, but over a limited turndown.

Engineering Specifications • Low velocity flow rates

• High accuracy: to ± 0.50%

• Repeatability: ±0.050%

• Verified flow coefficients

• No calibration required

• Extended turndown

• No straight run requirements

• Low permanent pressure loss

• Mass or volumetric flow

No Straight Run RequiredThe Accelabar® can be used in extremely limited straight run piping configurations. The straight run is integral to the meter. The stabilization and linearization of the velocity profile within the throat of the nozzle eliminates the need for any upstream run.

Actual Application (see data on page 3)

Application: 3” Sch 40 Natural Gas

Operating Pressure/ Temperature: 50 PSIG/70°F

Max/Min Flow Rate: 60,000 SCFH/1,000 SCFH

Flow Turndown: 60:1

Straight Run: 0”

US Patent No. 6,868,741 B2 and various foreign patents pending.

Verabar® Provides the Accuracy

The proventechnology of theVerabar® makes the Accelabar® work.It accurately measures the flow rate within the nozzle. Its unique bullet shape, constant flow coefficient, solid one-piece construction, non-clog design and signal stability make it the only design capable of producing the overall performance.

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VERIS Accelabar® ...Performance Characteristics

Comparative Analysis vs. Other Flow MetersThe Accelabar® fills the need not presently being filled by other flow meters for applications that:

• Do not have sufficient velocity to produce a readable signal or sufficient turndown

• Require the highest accuracy over an extended range

• Have little or no straight run piping before the meter

The Accelabar® performance characteristics far exceed those of other DP meters, vortex meters and many other flow meters.

These charts show the actual performance characteristics of the Accelabar® versus other flow meters based on the following flow conditions:

Flow ConditionsFluid Natural Gas

Pipe Size 3” Sch 40

Max Flow 60,000 SCFH

SG 0.6

Pressure 50 psig

Temperature 70°F

Pipe Line Velocity 74 ft/sec

Accelabar Increased VelocityFluid Velocity — Pipe Line vs. Accelabar Throat

Accelabar

Pip Line

0 100 200 300 400 500

74

420

Feet per Second

DP at Maximum FlowInches H2O — 3” Natural Gas 60,000 SCFH

Accelabar

Orifice Plate

Cone Type

Averaging Pitot0 100 200 300 400

100

115

6.5

304

DP (Inches H2O)

Flow TurndownMaximum & Minimum

Accelabar

Orifice Plate

Cone Type

Averaging Pitot

Flow TurndownAccelabar vs. Vortex

Accelabar (3”)

Vortex (3”)

0 25 50 75

0 25 50 75

4

7.4

25

6

60

60

Max. Flow / Min. Flow

Flow Turndown

Minimum Straight Run RequirementsAccelabar

Vortex

Orifice Plate

Cone Type

Averaging Pitot0 10 20 30

20

3

8

0

30

Equivalent Pipe Diameters (Inches)

Permanent Pressure LossAccelabar

Orifice Plate

Cone Type

0 25 50 75

75

60

35

% Permanent Pressure Loss

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VERIS Accelabar® ...Test Data

The Proof Is In The Data Many flow meters claim high accuracy and rangeability or turndown. However, few manufacturers define their limitations and even fewer can support it with actual test data. The tests below show the performance capabilities of the Accelabar®.

Tested at CEESI (an independent Flow Lab)

No Straight Run Test ComparisonTest SpecificationsThe Accelabar® was tested immediately downstream of a valve, tee and expander assembly with no straight run upstream.

ResultsThe short run test plotted with the standard straight run test verifies there is no shift in the flow coefficient.

Verified Accuracy and Flow CoefficientsEmpirical TEST DATA from independent laboratories verified an analytical model and flow coefficients as constant and independent of Reynolds Number, and within +/- 0.5% of the predicted value over an extended turndown in flow.This eliminates the need for calibration.

* Independent, NIST traceable tests were performed as follows:• Air tests in 3”, 4”, 6” and 12” pipes • NIST traceable water tests • Large turndown natural gas testing • Short straight-run testingConsult factory for a copy of certified tests.

ResultsThe Accelabar® produced a DP of 306” H2O at 145 ACFM. An accuracy of +/- 0.75% over an extended Reynolds number range. No other flow meter is capable of these operating ranges.

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VERIS Accelabar® ...Models and Specifications

Ready to InstallThe Accelabar® is a complete flow meter ready to install. It comes complete with single or dual transmitters depending on the turndown requirements.

An optional RTD is supplied in a Thermowell for dynamic compensation (required for use with multivariable transmitter).

AF Flanged Model

Accelabar® flow nozzle

Weld neck RF flange

Verabar®

RTD (optional)

Transmitter

Graphite packing

Packing follower

Retaining plate

Manifold head

L

Accelabar® Model Selection 1. Furnish your flowing conditions. A flow calculation is required

to determine the DP and verification of the operating limits.

• Each meter size has a standard beta ratio sized for the optimal operating range.

• The maximum operating limits are determined by the Accelabar® flow calculation.

2. If your flowing conditions exceed the operating limits, a larger or smaller model (meter size) must be selected.

Chart A

*Face to face dimensions nominal. Custom lengths available.

Specifications

Accuracy Repeatability Sensor, Body & Flange

to ± 0.50% ±0.050% 316SS

Flowing Conditions

*Density is not required for steam applications.

General Data Fluid Parameters Maximum Normal Minimum Units

Tag number Flow Rate

Pipe size & schedule or exact ID & wall thickness

Pressure

Temperature

Fluid name: Density*

Meter SizeVerabar Sensor

Face to Face “L”Class 150# Class 300# Class 600# PN10 PN16 PN40 PN63 PN100

2” (DN50) -05 1/2”8.75”

(222.3mm)9.38”

(238.2mm)10.13”

(257.1mm)11.54”

(293.2mm)11.54”

(293.2mm)11.78”

(296.2mm)12.88”

(327.2mm)13.35”

(339.2mm)

3” (DN80) -05 1/2”13.78”

(350.0mm)14.53”

(369.0mm)15.28”

(388.1mm)12.31”

(312.8mm)12.31”

(312.8mm)12.94”

(328.8mm)14.04”

(356.8mm)14.52”

(368.8mm)

4” (DN100) -05 1/2”15.15”

(384.8mm)15.90”

(403.9mm)17.65”

(448.3mm)13.34”

(338.9mm)13.34”

(338.9mm)14.36”

(364.9mm)15.39”

(390.9mm)16.34”

(414.9mm)

6” (DN150) -10 1/2”19.15”

(486.4mm)19.90”

(505.5mm)21.90”

(556.3mm)16.58”

(421.1mm)16.58”

(421.1mm)18.15”

(461.1mm)19.73”

(501.1mm)21.30”

(541.1mm)

8” (DN200) -10 1/2”21.40”

(543.6mm)22.15”

(562.6mm)24.40”

(619.7mm)18.38”

(466.9mm)18.38”

(466.9mm)20.42”

(518.9mm)22.16”

(562.9mm)23.74”

(602.9mm)

10” (DN250 -10 1/2”23.15”

(588.0mm)24.40”

(619.8mm)27.65”

(702.31mm)20.60”

(523.3mm)20.76”

(527.3mm)23.51”

(597.3mm)25.09”

(637.3mm)27.61”

(701.3mm)

12” (DN300) -10 1/2”26.17”

(664.7mm)27.78”

(705.6mm)29.67”

(753.6mm)22.62”

(574.6mm)23.41”

(594.6mm)26.32”

(668.6mm)28.29”

(718.6mm)30.65”

(778.6mm)

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VERIS Accelabar® ...Ordering InformationModel Accelabar 316SS

AFSABSATS

Flanged ConnectionsBevel for WeldMNPT Threaded Ends (2” meter only)

User Mating Pipe Size and Schedule or Exact ID and Wall Thickness

Code User Mating Flange (Model AFS Only)

150300600

150# ANSI Class 275 psig @ 100°F, 80 psig @ 800°F (19 Bars @ 38°C, 5.5 Bars @ 426°C)300# ANSI Class 720 psig @ 100°F, 330 psig @ 800°F (49.6 Bars @ 38°C, 22.8 Bars @ 426°C)600# ANSI Class 1440 psig @ 100°F, 660 psig @ 800°F (99.3 Bars @ 38°C, 45.5 Bars @ 426°C)If other than ANSI, specify Standard (DIN, JIS) Size and Rating

Code Flange Material

CS

Carbon SteelStainless Steel

Accelabar Meter Size

Important: If the selected meter size is larger or smaller than the user’s mating pipe and flange, expanders or reducers are required. Consult the factory for price and delivery.

Code Verabar Size

0510

7/16” (11mm) 7/8” (22mm)

Code Pipe Orientation

HV

HorizontalVertical

Instrument Head Connections (Select Remote or Direct Mount Transmitter—Sold Separately)

Direct Mount Transmitter(Flanged 450°F/232°C Max.)

Remote Mount Transmitter(1/2” NPT)

Manifold Transmount Valve Regular Parallel

M F T R P

Integral Integral

Manifolds (Optional) Instrument Valves (Optional)

Direct Mount Remote Mount

3-Valve 5-Valve Needle Gate

1/2” NPT 1/2” NPTSoft Seat Hard Seat Soft Seat Hard Seat

F3SC (CS)F3SS (SS)

F3HC (CS)F3HS (SS)

F5SC (CS)F5SS (SS)

F5HC (CS)F5HS (SS)

C2NC (CS)C2NS (SS)

C2GC (CS)C2GS (SS)

Optional

Optional

Optional

Code RTD in Thermowell

H1H2HTNH

Hazardous Location, Class 1 Div 1, Explosion ProofHazardous Location, Class 1 Div 2, Non-Incendive WiringHigh Temperature (500ºF to 900ºF, 260ºC to 482ºC) Non-Hazardous Location

Code Connection Cable to Transmitter (Direct Mount Only)

XPN4

Explosion Proof (hazardous locations)NEMA 4

AFS 6”Sch40 150 SS 4” 05 H R C2NC H2 XP For Transmitter Selection, see Page 7.

2”(50mm)

3”(75mm)

4”(100mm)

6”(150mm)

8”(200mm)

10”(250mm)

12”(300mm)

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VERIS Accelabar®

...True Performance in Flow Measurement

Installation Orientation

Direct Mount Remote Mount

Transmitter

Transmitter

Verabar®

GasMount to

top of pipe

Steam & LiquidMount to bottom of

pipe

Steam & LiquidMount to bottom of pipe

Transmitter

Manifold

Fill tee (steam only)

Instrument valves

Verabar®

Manifold head

Verabar®

Manifold head

160º Steam

160º Steam

Gas 160º

GasMount to top of pipe

Instrument tubing & fittings not

included

Transmitter

Verabar®

Manifold

Gas 160º

Transmitter SelectionAccelabar® accuracy is percent of rate. The Accelabar® maintains a constant flow coefficient over a wide range of flow rates and differential pressures.

DP transmitter accuracy is percent of scale. While most Accelabar® installations are equipped with one DP transmitter, some applications requiring superior accuracy over an extreme DP turndown may require a dual DP transmitter installation.

Instrument tubing & fittings not

included

Single Transmitter

Dual Transmitter

VERIS Accelabar® ...The Best Choice in Flow Meters

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INTELLIGENT SOLUTIONS IN STEAM, AIR AND HOT WATER

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superior flow measurement accuracy - … accelabar®...a new idea in flow measurement the unique...

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